*,
*::before,
*::after {
  box-sizing: inherit;
  -webkit-tap-highlight-color: transparent;
}
html {
  box-sizing: border-box;
  font-family: 'Helvetica Neue', Tahoma, Arial, PingFangSC-Regular, 'Hiragino Sans GB', 'Microsoft Yahei', sans-serif;
  user-select: none;
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
}
body {
  margin: 0;
}
.banner img {
  width: 100%;
}